JPH0577365B2 - - Google Patents
Info
- Publication number
- JPH0577365B2 JPH0577365B2 JP63066069A JP6606988A JPH0577365B2 JP H0577365 B2 JPH0577365 B2 JP H0577365B2 JP 63066069 A JP63066069 A JP 63066069A JP 6606988 A JP6606988 A JP 6606988A JP H0577365 B2 JPH0577365 B2 JP H0577365B2
- Authority
- JP
- Japan
- Prior art keywords
- fish
- screen
- electric
- optical screen
- swimming
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Farming Of Fish And Shellfish (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、水中に並行に形成した光スクリーン
及び電気スクリーンにより、水中における魚類の
遊泳を遮断し、魚類の所定水域への侵入や所定水
域からの脱出を防止する魚類の遊泳遮断方法に関
する。[Detailed Description of the Invention] [Industrial Application Field] The present invention uses a light screen and an electric screen formed in parallel underwater to block fish from swimming in the water, and prevent fish from entering a predetermined water area. This invention relates to a method for blocking the swimming of fish to prevent them from escaping.
従来、魚類の養殖などのために、所定水域への
魚類の侵入や所定水域からの魚類の脱出を防止す
る様々な手法が採られており、最も一般的には、
綱を用いる手法があるが、これは網事態が風浪に
よつて損傷し易く、綱の保守、維持に多大な労力
と費用とを要するため、最近では綱を用いること
なく、魚類に対する威嚇効果を利用する手法が考
えられている。
Conventionally, for purposes such as fish farming, various methods have been adopted to prevent fish from entering or escaping from designated water areas.The most common methods are:
There is a method that uses a rope, but this method is easy to damage the net due to wind and waves, and requires a lot of effort and expense to maintain and maintain the rope.Recently, methods have been developed that have a threatening effect on fish without using a rope. A method to use it is being considered.
その１例として、電気スクリーンによる手法が
あり、これは水中に複数の電極列を配列し、これ
らの各電極列に電気スクリーン発生用の電源によ
り異なる電位を与え、各電極列間に所定の電界強
度の電気スクリーンを形成し、該電気スクリーン
に侵入した魚類に対し、電気スクリーンによる電
気的刺激を与えて魚類を威嚇し、魚類の遊泳を遮
断するものである。 One example is the electric screen method, in which multiple electrode rows are arranged in water, a different potential is applied to each electrode row by a power source for generating the electric screen, and a predetermined electric field is created between each electrode row. A strong electric screen is formed, and the electric screen applies electrical stimulation to the fish that have entered the electric screen to intimidate the fish and prevent them from swimming.
ところで、魚対に直接電気的刺激が加わると、
魚類は即座に忌避行動をとるため、極めて高い遮
断効果を有する反面、電気スクリーンの電気的刺
激によつて、麻痺状態に陥り、仮死状態さらには
死に至る魚体が多数発生する。 By the way, when electrical stimulation is applied directly to the fish pair,
Since fish immediately take repellent behavior, it has an extremely high shielding effect, but on the other hand, the electrical stimulation of the electric screen causes many fish to become paralyzed, enter a state of asphyxia, and even die.
そこで本件出願人は、前記した電気スクリーン
及び光スクリーンにより魚類の遊泳を遮断する方
法を提案しており、これは光スクリーンの威嚇効
果により、電気スクリーンへの魚類の接近を抑制
し、電気スクリーンへの侵入魚の低減を図り、魚
類の遊泳を確実に遮断すると同時に、電気的刺激
による魚体の損傷を低減するものである。（特願
昭61−236632号の出願明細書及び図面参照）
〔発明が解決しようとする課題〕
しかし、前記した電気スクリーンと光スクリー
ンの併用の場合、消費電力が大きいため、コスト
が非常に高くなるという問題点がある。 Therefore, the applicant has proposed a method of blocking the swimming of fish using the above-mentioned electric screen and optical screen.This method uses the intimidating effect of the optical screen to suppress the approach of fish to the electric screen, and This aims to reduce the number of invading fish, reliably block fish swimming, and at the same time reduce damage to fish bodies caused by electrical stimulation. (Refer to the specification and drawings of Japanese Patent Application No. 61-236632.) [Problems to be Solved by the Invention] However, when the above-mentioned electric screen and optical screen are used together, the cost is extremely high due to the large power consumption. There is a problem with that.
本発明は、前記の点に留意してなされ、魚類の
遊泳を確実に遮断するとともに、消費電力を低減
して低コスト化を図ることを目的とする。 The present invention has been made with the above points in mind, and aims to reliably block the swimming of fish and to reduce power consumption and cost.
つぎに、前記目的を達成するための手段を、実
施例に対応する第１図ないし第３図を用いて説明
する。
Next, means for achieving the above object will be explained using FIGS. 1 to 3, which correspond to embodiments.
すなわち、水中に、光スクリーン１及び所定電
界強度の電気スクリーン２を並行に形成し、前記
両スクリーン１，２により、水中における魚類の
遊泳を遮断する魚類の遊泳遮断方法において、本
発明では、
前記光スクリーン１の前記電気スクリーン２の
反対側に近接した魚群検知領域５への魚類の侵入
を検知する第１魚群検知器７のセンサ部を水中に
設けるとともに、
前記両スクリーン１，２の間の魚群検知領域６
への魚類の侵入を検知する第２魚群検知器８のセ
ンサ部を水中に設け、
前記第１、第２魚群検知器７，８それぞれによ
る魚類の検知時に、前記光スクリーン１及び前記
電気スクリーン２をそれぞれ形成するという技術
的手段を講じている。 That is, in the present invention, in a method for blocking fish swimming, in which an optical screen 1 and an electric screen 2 having a predetermined electric field strength are formed in parallel in water, and both the screens 1 and 2 block fish swimming in the water. A sensor section of a first fish school detector 7 that detects the intrusion of fish into a fish school detection area 5 adjacent to the opposite side of the electric screen 2 of the optical screen 1 is provided underwater, and a sensor section between the two screens 1 and 2 is provided underwater. Fish school detection area 6
A sensor section of a second fish school detector 8 that detects the intrusion of fish is provided underwater, and when the first and second fish school detectors 7 and 8 detect fish, the optical screen 1 and the electric screen 2 We are taking technical measures to form each.
したがつて、本発明によると、第１魚群検知器
７により魚類が検知されたときに、光スクリーン
１が形成され、第２魚群検知器８により魚類が検
知されたときに、電気スクリーン２が形成される
ため、光スクリーン１及び電気スクリーン２が常
時形成されるのではなく、魚類が光スクリーン１
の形成領域に接近したときに光スクリーン１が形
成され、魚類が光スクリーン１を突破して電気ス
クリーン２の形成領域に接近したときに、電気ス
クリーン２が形成され、必要時にのみ両スクリー
ン１，２が形成されることになり、常時形成する
場合に比べ、消費電力が低減され、低コスト化が
図れる。
Therefore, according to the present invention, when a fish is detected by the first fish detector 7, the optical screen 1 is formed, and when a fish is detected by the second fish detector 8, the electric screen 2 is formed. Therefore, the optical screen 1 and the electric screen 2 are not always formed, but the fish are exposed to the optical screen 1.
The optical screen 1 is formed when the fish approaches the formation area of the electric screen 2, and when the fish breaks through the optical screen 1 and approaches the formation area of the electric screen 2, the electric screen 2 is formed. 2 is formed, and compared to the case where it is always formed, power consumption is reduced and costs can be reduced.
また、光スクリーン１を常時形成した場合、魚
類の光スクリーン１に対する慣れにより光スクリ
ーン１の威嚇効果が薄れるが、前記したように魚
類が光スクリーン１の形成領域に接近したときに
のみ光スクリーン１を形成すると、光スクリーン
１に対する慣れが防止され、光スクリーン１の威
嚇効果が維持され、魚類の遊泳がより確実に遮断
される。 In addition, if the optical screen 1 is always formed, the threatening effect of the optical screen 1 will weaken as the fish get used to the optical screen 1, but as mentioned above, the optical screen 1 will only appear when the fish approaches the area where the optical screen 1 is formed. By forming this, habituation to the optical screen 1 is prevented, the intimidating effect of the optical screen 1 is maintained, and swimming of fish is more reliably blocked.
つぎに、本発明を、養殖用の海洋牧場に適した
実施例を示す図面とともに詳細に説明する。
Next, the present invention will be explained in detail with reference to drawings showing an embodiment suitable for a marine farm for aquaculture.
実施例 １
まず、実施例１を示した第１図ないし第４図に
ついて説明する。Example 1 First, FIGS. 1 to 4 showing Example 1 will be explained.
全体の構成を模式的に表わした第１図におい
て、１は海洋牧場と外海との境界である遊泳遮断
部に形成される光スクリーンであり、海水中ある
いは海上に配設された図外の光源によりスクリー
ン状に光が発生されて形成される。 In Fig. 1, which schematically shows the overall configuration, 1 is a light screen formed at the swimming barrier that is the boundary between the ocean farm and the open sea, and a light source not shown in the figure installed in the sea or on the sea. The light is generated and formed in a screen shape.
２は前記遊泳遮断部に光スクリーン１の外海側
に形成される所定電界強度の電気スクリーンであ
り、海水中に並行に配列された図外の複数の電極
列に、後述の電源により、異なる電位が与えら
れ、前記各電極列間に電気スクリーン２が形成さ
れる。 Reference numeral 2 denotes an electric screen with a predetermined electric field strength formed on the open sea side of the optical screen 1 in the swimming cutoff section, and a plurality of electrode rows (not shown) arranged in parallel in the seawater are provided with different potentials by a power source described later. is provided, and an electric screen 2 is formed between each of the electrode rows.
３，４はそれぞれ前記した光源及び各電極列に
給電する光スクリーン発生用電源及び電気スクリ
ーン発生用電源、５は光スクリーン１の海洋牧場
側に近接した魚群検知領域、６は両スクリーン
１，２間の魚群検知領域、７，８は第１、第２魚
群検知器であり、水中に設けられたセンサ部であ
る超音波の送受波部及び検知部からなり、両検知
器７，８により、それぞれ両領域５，６への魚類
の侵入が検知される。 Reference numerals 3 and 4 denote a power source for generating an optical screen and a power source for generating an electric screen, which respectively supply power to the light source and each electrode array described above; 5 denotes a fish school detection area close to the marine farm side of the optical screen 1; 6 denotes both screens 1 and 2. The fish school detection areas 7 and 8 in between are first and second fish school detectors, which are composed of an ultrasonic wave transmitting/receiving section and a detection section, which are sensor sections provided underwater. Intrusion of fish into both areas 5 and 6 is detected, respectively.
このとき、両魚群検知器７，８のセンサ部であ
る送受波部Ｓは、第２図及び第３図に示すよう
に、両領域５，６の海水中に設けられ、第２図、
第３図中の破線に示すように、送受波部Ｓによ
り、超音波が放射されるとともに、反射波が受波
され、受信信号がそれぞれ前記検知部から出力さ
れ、該検知部では、入力される受波信号と、ノイ
ズレベルよりやや高い基準信号とが比較され、前
記受波信号が前記基準信号を上回るときに、検知
信号が出力されるようになつている。 At this time, the wave transmitting/receiving section S, which is the sensor section of both fish school detectors 7 and 8, is provided in the seawater of both regions 5 and 6, as shown in FIGS. 2 and 3.
As shown by the broken line in FIG. 3, the wave transmitting/receiving section S emits ultrasonic waves and receives reflected waves, and each received signal is output from the detection section, and the detection section receives the input signal and receives the reflected wave. The received signal is compared with a reference signal that is slightly higher than the noise level, and when the received signal exceeds the reference signal, a detection signal is output.
このように、両魚群検知器７，８の送受波部Ｓ
を海水中に配設すると、海面上から検知を行なう
場合よりも検知エリアが広がり、対象となる領域
５，６がかなり広くても、魚類の侵入をかなり精
度よく検知できる。 In this way, the wave transmitting/receiving parts S of both fish school detectors 7 and 8
When placed in seawater, the detection area is wider than when detection is performed from above the sea surface, and even if the target areas 5 and 6 are quite wide, intrusion of fish can be detected with high accuracy.
さらに、第１図において、９，１０は第１、第
２制御部であり、両検知器７，８それぞれによる
魚類の検知時に、両制御部９，１０により、両電
源３，４がそれぞれ駆動投入されて光スクリーン
１及び電気スクリーン２がそれぞれ形成される。 Furthermore, in FIG. 1, reference numerals 9 and 10 are first and second control units, and when the detectors 7 and 8 detect fish, the control units 9 and 10 respectively drive the power supplies 3 and 4. The optical screen 1 and the electrical screen 2 are respectively formed.
つぎに、前記実施例１の動作について説明す
る。 Next, the operation of the first embodiment will be explained.
いま、第１、第２魚群検知器７，８により、両
魚群検知領域５，６の検知が行われ、たとえば第
４図ａ，ｂにそれぞれ示すような受波信号が両検
知器７，８の送受波部Ｓから検知部に入力される
と、両検知器７，８の検知部により、入力された
受波信号それぞれと、第４図ａ，ｂ中にそれぞれ
示すレベルVe，Ve′の基準信号とが比較され、前
者の受波信号が後者の基準信号を上回るときに、
両魚群検知領域５，６それぞれに魚類が侵入した
として両検知器７，８からそれぞれ検知信号が出
力される。 Now, the first and second fish school detectors 7 and 8 detect both fish school detection areas 5 and 6, and for example, received signals as shown in FIG. When the signal is input from the transmitting/receiving section S to the detecting section, the detecting sections of both the detectors 7 and 8 detect the input received signals and the levels Ve and Ve' shown in FIG. 4a and b, respectively. When the received signal of the former exceeds the reference signal of the latter,
Detection signals are output from both detectors 7 and 8, respectively, assuming that fish have invaded both fish school detection areas 5 and 6, respectively.
そして、前記両検知信号に基づき、両制御部
９，１０により電源３，４が制御され、第１魚群
検知器７から検知信号が出力されたとき、海洋牧
場内の魚類が光スクリーン１の形成領域に接近し
たとして、第４図ｃに示すように、電源３が投入
されて光スクリーン１が形成され、第２魚群検知
器８から検知信号が出力されたとき、魚類が光ス
クリーン１を突破して電気スクリーン２の形成領
域に接近したとして、同図ｄに示すように、電源
４が投入されて電気スクリーン２が形成される。 Then, based on the detection signals, the control units 9 and 10 control the power supplies 3 and 4, and when the detection signal is output from the first fish detector 7, the fish in the marine farm form the optical screen 1. When the fish approaches the area, the power source 3 is turned on, the optical screen 1 is formed, and the second fish detector 8 outputs a detection signal, as shown in FIG. 4c, when the fish break through the optical screen 1. When the electric screen 2 is formed, the power source 4 is turned on and the electric screen 2 is formed, as shown in FIG.
このとき、第１魚群検知器７からの検知信号と
第２魚群検知器８からの検知信号とが、続けて出
力されるときには、海洋牧場内の魚類が光スクリ
ーン１の形成領域を勢いよく突破したとして、電
源３が投入されることなく、電源４のみが投入さ
れ、電気スクリーン２のみが形成される。 At this time, when the detection signal from the first fish detector 7 and the detection signal from the second fish detector 8 are output in succession, the fish in the marine farm forcefully break through the formation area of the optical screen 1. In this case, only the power source 4 is turned on without the power source 3 being turned on, and only the electric screen 2 is formed.
したがつて、前記実施例１によると、光スクリ
ーン１及び電気スクリーン２が常時形成されるの
ではなく、魚類が光スクリーン１の形成領域に接
近したときに光スクリーン１が形成され、魚類が
光スクリーン１を突破して電気スクリーン２の形
成領域に接近したときに、電気スクリーン２が形
成されるため、必要時にのみ両スクリーン１，２
が形成されることになり、常時形成する場合に比
べ、消費電力を低減することができ、低コスト化
を図ることができる。 Therefore, according to the first embodiment, the optical screen 1 and the electric screen 2 are not always formed, but the optical screen 1 is formed when the fish approaches the area where the optical screen 1 is formed, and the fish are exposed to the light. Since electric screen 2 is formed when you break through screen 1 and approach the formation area of electric screen 2, both screens 1 and 2 are formed only when necessary.
is formed, and as compared to the case where it is formed all the time, power consumption can be reduced and costs can be reduced.
また、光スクリーン１を常時形成した場合、魚
類の光スクリーン１に対する慣れにより光スクリ
ーン１の威嚇効果が薄れるが、前記したように魚
類が光スクリーン１の形成領域に接近したときに
のみ光スクリーン１を形成すると、光スクリーン
１に対する慣れを防止でき、光スクリーン１の威
嚇効果を維持することができ、魚類の遊泳をより
確実に遮断することが可能となる。 In addition, if the optical screen 1 is always formed, the threatening effect of the optical screen 1 will weaken as the fish get used to the optical screen 1, but as mentioned above, the optical screen 1 will only appear when the fish approaches the area where the optical screen 1 is formed. By forming this, it is possible to prevent habituation to the optical screen 1, maintain the intimidating effect of the optical screen 1, and more reliably block fish from swimming.
実施例 ２
つぎに、実施例２を示した第５図及び第６図に
ついて説明する。Example 2 Next, FIGS. 5 and 6 showing Example 2 will be explained.
第５図において、第１図と同一記号は同一もし
くは対応するものを示し、第１図と異なる点は、
遊泳遮断部における電気スクリーン２の形成領域
を、２個の電気スクリーン２ａ，２ｂの形成領域
に分割するとともに、魚群検知領域６を、２個の
魚群検知領域６ａ，６ｂに分割し、該両領域６
ａ，６ｂへの魚類の侵入を、第２魚群検知器８と
しての２個の魚群検知器８ａ，８ｂによりそれぞ
れ検知し、前記両魚群検知器８ａ，８ｂそれぞれ
による魚類の検知時に、２個の電気スクリーン発
生用電源４ａ，４ｂをそれぞれ駆動投入して両電
気スクリーン２ａ，２ｂをそれぞれ形成するよう
にした点である。 In Fig. 5, the same symbols as in Fig. 1 indicate the same or corresponding items, and the differences from Fig. 1 are as follows.
The formation area of the electric screen 2 in the swimming cutoff part is divided into two formation areas of the electric screens 2a and 2b, and the fish school detection area 6 is divided into two fish school detection areas 6a and 6b, and both areas are divided into two formation areas of the electric screen 2a and 2b. 6
The two fish school detectors 8a and 8b serving as the second fish school detector 8 detect the intrusion of fish into the areas a and 6b, respectively, and when the two fish school detectors 8a and 8b detect the fish, The point is that the electric screen generation power supplies 4a and 4b are respectively turned on to form both electric screens 2a and 2b, respectively.
つぎに、前記実施例２の動作について説明す
る。 Next, the operation of the second embodiment will be explained.
いま、各魚群検知器７，８ａ，８ｂにより、各
魚群検知領域５，６ａ，６ｂそれぞれの探知が行
われ、たとえば第６図ａ，ｂ，ｃにそれぞれ示す
ような受波信号が各検知器７，８ａ，８ｂの送受
波部から検知部に入力されると、各検知器７，８
ａ，８ｂの検知部により、入力された受波信号そ
れぞれと、第６図ａ，ｂ，ｃ中にそれぞれ示すレ
ベルVe1，Ve2，Ve′の基準信号とが比較され、そ
れぞれ前者の受波信号が後者の基準信号を上回る
ときに、各魚群検知領域５，６ａ，６ｂそれぞれ
に魚類が侵入したとして各検知器７，８ａ，８ｂ
からそれぞれ検知信号が出力される。 Now, each fish school detection area 5, 6a, 6b is detected by each fish school detector 7, 8a, 8b, and the received signals as shown in FIG. When input to the detection unit from the wave transmitting/receiving unit of 7, 8a, 8b, each detector 7, 8
The detection units a and 8b compare each of the input received signals with the reference signals of levels Ve 1 , Ve 2 , and Ve' shown in FIGS. 6 a, b, and c, respectively. When the wave signal exceeds the latter reference signal, each detector 7, 8a, 8b assumes that fish have invaded each fish school detection area 5, 6a, 6b.
A detection signal is output from each.
そして、前記各検知信号に基づき、両制御部
９，１０により電源３，４ａ，４ｂが制御され、
第１魚群検知器７から検知信号が出力されたと
き、海洋牧場内の魚類が光スクリーン１の形成領
域に接近したとして、第６図ｄに示すように、電
源３が投入されて光スクリーン１が形成され、第
２魚群検知器としての両魚群検知器８ａ，８ｂそ
れぞれから検知信号が出力されたとき、魚類が光
スクリーン１を突破して電気スクリーン２ａ，２
ｂの形成領域にそれぞれ接近したとして、同図
ｅ，ｆにそれぞれ示すように、電源４ａ，４ｂが
それぞれ投入されて電気スクリーン２ａ，２ｂが
それぞれ形成される。 Then, based on each of the detection signals, the power supplies 3, 4a, 4b are controlled by both control units 9, 10,
When the first fish detector 7 outputs a detection signal, assuming that fish in the marine farm have approached the area where the optical screen 1 is formed, the power source 3 is turned on and the optical screen 1 is turned on, as shown in FIG. 6d. is formed and a detection signal is output from both fish school detectors 8a and 8b as the second fish school detectors, the fish breaks through the optical screen 1 and appears on the electric screens 2a and 2.
As the electric screens 2a and 2b are approached, the power supplies 4a and 4b are turned on, respectively, and the electric screens 2a and 2b are formed, as shown in e and f of the figure, respectively.
このとき、第１魚群検知群７からの検知信号
と、第２魚群検知器としての魚群検知器８ａ又は
８ｂからの検知信号とが、ほぼ続けて出力される
ときには、前記実施例１と同様、海洋牧場内の魚
類が光スクリーン１の形成領域を勢いよく突破し
たとして、電源３が投入されることなく、電源４
ａ又は４ｂのみが投入され、電気スクリーン２ａ
又は２ｂのみが形成される。 At this time, when the detection signal from the first fish school detection group 7 and the detection signal from the fish school detector 8a or 8b as the second fish school detector are output almost continuously, as in the first embodiment, If fish in the marine farm forcefully break through the area where optical screen 1 is formed, power source 4 is turned on without power source 3 being turned on.
Only a or 4b is input, and the electric screen 2a
Or only 2b is formed.
したがつて、前記実施例２によると、前記した
実施例１と同等の効果を得ることができるのは勿
論のこと、実施例１における電気スクリーン２を
２個の電気スクリーン２ａ，２ｂに分割したた
め、必要な方の電気スクリーンのみを形成すれば
よく、実施例１に比べ、消費電力をさらに低減す
ることができる。 Therefore, according to the second embodiment, it is possible to obtain the same effect as the first embodiment, and also because the electric screen 2 in the first embodiment is divided into two electric screens 2a and 2b. , only the necessary electric screens need be formed, and power consumption can be further reduced compared to the first embodiment.
なお、電気スクリーンを、３個以上に分割して
もよいのは言うまでもない。 It goes without saying that the electric screen may be divided into three or more pieces.
また、電気スクリーン２，２ａ，２ｂの外海側
にも前記両実施例と同様のシステムを設けてもよ
い。 Furthermore, a system similar to that of both of the above embodiments may be provided on the open sea side of the electric screens 2, 2a, 2b.
本発明は、以上説明したように構成されている
ので、以下に記載するような効果を奏する。
Since the present invention is configured as described above, it produces the effects described below.
光スクリーンと電気スクリーンとにより、魚類
の遊泳を確実に遮断することができるのは勿論の
こと、光スクリーン及び電気スクリーンを常時形
成するのではなく、魚群検知器により光スクリー
ンの形成領域及び電気スクリーンの形成領域それ
ぞれに魚類が接近したときのみ、光スクリーン及
び電気スクリーンをそれぞれ形成するため、消費
電力を低減することができ、低コスト化を図るこ
とが可能となり、魚類の養殖において極めて有効
である。 Of course, the optical screen and electric screen can reliably block the swimming of fish, but instead of forming the optical screen and electric screen all the time, the fish school detector can be used to detect the area where the optical screen is formed and the electric screen. Since the optical screen and electric screen are formed only when fish approach each formation area, it is possible to reduce power consumption and cost, making it extremely effective in fish farming. .
図面は、本発明の魚類の遊泳遮断方法の実施例
を示し、第１図ないし第４図は実施例１を示し、
第１図は模式図、第２図及び第３図は一部の正面
図及び模式図、第４図ａ〜ｄは動作説明用の各種
信号波形図、第５図及び第６図は実施例２を示
し、第５図は模式図、第６図ａ〜ｆは動作説明用
の各種信号波形図である。
１……光スクリーン、２，２ａ，２ｂ……電気
スクリーン、５，６，６ａ，６ｂ……魚群検知領
域、７，８，８ａ，８ｂ……魚群検知器。
The drawings show an example of the method for blocking fish swimming of the present invention, and FIGS. 1 to 4 show Example 1,
FIG. 1 is a schematic diagram, FIGS. 2 and 3 are partial front views and schematic diagrams, FIGS. 4 a to d are various signal waveform diagrams for explaining operation, and FIGS. 5 and 6 are embodiments. 2, FIG. 5 is a schematic diagram, and FIGS. 6 a to 6 f are various signal waveform diagrams for explaining the operation. 1... Optical screen, 2, 2a, 2b... Electric screen, 5, 6, 6a, 6b... Fish school detection area, 7, 8, 8a, 8b... Fish school detector.
Claims (1)
気スクリーンを並行に形成し、前記両スクリーン
により、水中における魚類の遊泳を遮断する魚類
の遊泳遮断方法において、 前記光スクリーンの前記電気スクリーンの反対
側に近接した領域への魚類の侵入を検知する第１
魚群検知器を水中に設けるとともに、 前記両スクリーンの間の領域への魚類の侵入を
検知する第２魚群検知器を水中に設け、 前記第１、第２魚群検知器それぞれによる魚類
の検知時に、前記光スクリーン及び前記電気スク
リーンをそれぞれ形成することを特徴とする魚類
の遊泳遮断方法。[Scope of Claims] 1. A method for blocking fish swimming, in which a light screen and an electric screen having a predetermined electric field strength are formed in parallel in water, and both screens block fish swimming in the water, comprising: The first one detects the intrusion of fish into the area adjacent to the opposite side of the electric screen.
A fish school detector is provided underwater, and a second fish school detector is provided underwater that detects the intrusion of fish into the area between the two screens, and when each of the first and second fish school detectors detects fish, A method for blocking swimming of fish, characterized in that the optical screen and the electric screen are respectively formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63066069A JPH01240130A (en) | 1988-03-18 | 1988-03-18 | Swimming inteception for fish |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63066069A JPH01240130A (en) | 1988-03-18 | 1988-03-18 | Swimming inteception for fish |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01240130A JPH01240130A (en) | 1989-09-25 |
| JPH0577365B2 true JPH0577365B2 (en) | 1993-10-26 |
Family
ID=13305192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63066069A Granted JPH01240130A (en) | 1988-03-18 | 1988-03-18 | Swimming inteception for fish |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01240130A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO335513B1 (en) * | 2012-03-23 | 2014-12-22 | Arnvid Skogseth | Method of inhibiting one or more parasites from attacking and / or attaching to one or more aquatic animals |
-
1988
- 1988-03-18 JP JP63066069A patent/JPH01240130A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01240130A (en) | 1989-09-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Ross et al. | Response of alewives to high‐frequency sound at a power plant intake on Lake Ontario | |
| US5410519A (en) | Acoustic tracking system | |
| AU665768B2 (en) | Infra-acoustic/electric fish fence | |
| US5168471A (en) | Integrated passive acoustic and active ultrasonic marine aquatic finder system | |
| Kastelein et al. | Detection distances of bottom-set gillnets by harbour porpoises (Phocoena phocoena) and bottlenose dolphins (Tursiops truncatus) | |
| Lucke et al. | The use of an air bubble curtain to reduce the received sound levels for harbor porpoises (Phocoena phocoena) | |
| Vetter et al. | Characterization and management implications of silver carp (Hypophthalmichthys molitrix) jumping behavior in response to motorized watercraft. | |
| Hastie | Tracking marine mammals around marine renewable energy devices using active sonar | |
| Akamatsu et al. | Echolocation rates of two harbor porpoises (Phocoena phocoena) | |
| Kastelein et al. | Temporary hearing threshold shift in harbor seals (Phoca vitulina) due to one-sixth-octave noise bands centered at 0.5, 1, and 2 kHz | |
| GB2111679A (en) | Sonar intruder detectors | |
| CN109392890A (en) | A kind of construction waters Yangtze finless porpoise sound drives protective device and method | |
| JPH0577365B2 (en) | ||
| Lien et al. | The reaction of humpback whales to underwater explosions: orientation, movements, and behavior | |
| McDonald et al. | Vocalizations of blue and fin whales during a midocean ridge airgun experiment | |
| KR102096154B1 (en) | Fish cultivating system using sound wave and method thereof | |
| JPH0578291B2 (en) | ||
| JPH0328767Y2 (en) | ||
| RU2488844C2 (en) | Passive method and system for detecting objects moving in water | |
| Scronce et al. | Grey seal, Halichoerus: Echolocation not demonstrated | |
| JPH0347496Y2 (en) | ||
| JPH03198731A (en) | Method for watching width of net mouth of trawlnet | |
| JP2002090453A (en) | Fish finding device | |
| JPH0622414B2 (en) | Electric screen generator | |
| JPH0442792B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |